(Reuters) – Defending champion Andy Murray and 17-times grand slam winner sizzled under a Miami sun, speeding into the fourth round of the Sony Open on Sunday with convincing straight sets wins. Federer, twice a winner on the Miami hardcourts, needed just 62 minutes on a sweltering center court to dispose of Dutch qualifier Thiemo De Bakker 6-3 6-3 while Murray appeared to be adjusting just fine to life without coach Ivan Lendl, easing past […]